- Included species (for Kew Gardens 'World Checklist' & The Plant List, ):
- O. andina, O. carnea, O. elegans, O. litoralis
- Included species (for Tropicos, ):
- O. andina, O. carnea, O. chamissonis, O. elegans, O. grandiflora, O. leiboldiana, O. lindleyana, O. litoralis
- Note: list containing potentially synonyms
This category has the following 3 subcategories, out of 3 total.